Smart Probe for Multianalyte Signaling: Solvent Dependent Selective Recognition of I^–

Abstract

An azine based smart probe is developed for the naked eye and fluorescence recognition of I–. In both modes, the probe shows intense red color in the presence of I– in THF. Moreover, the probe shows solvent dependent multiple signaling, viz., green emission with Al3+ in aqueous methanol and ratiometric yellow emission with Zn2+ in DMSO. The structure of the hydrazine precursor of the probe has been confirmed by single crystal X-ray structure.The probe can detect as low as 1.2 × 10–7 M I–, 6.8 × 10–8 M Al3+, and 5.7 × 10–8 M Zn2+, whereas respective association constants are 3.6× 104 M–1, 5.2 × 104 M–1, and 7.9 × 104 M–1. Common ions do not interfere. Routine Al3+ and Zn2+ imaging in human breast cancer cell, MCF7, under fluorescence microscope has also been performed. The developed method is used for analysis of real samples.

A Hydrogen‐Bond‐Assisted CHEF Approach for Colorimetric and Fluorescence Recognition of Picric Acid and Its Solid‐Phase Extraction by an Immobilized Probe

“…Continuous efforts to eliminate the lacunas and limitations lead us to develop a PA selective probe that functions through hydrogen bond assisted CHEF process in a ratiometric manner in aqueous‐methanol (4/1, v/v). The silica immobilised probe is highly efficient for solid phase extractive removal of PA from environmental samples . The experimental findings have been substantiated by various spectroscopic techniques and theoretical studies (Figure S1‐18, ESI).…”

“…The silica immobilised probe is highly efficient for solid phase extractive removal of PA from environmental samples. [59] The experimental findings have been substantiated by various spectroscopic techniques and theoretical studies (Figure S1-18, ESI).…”

“…As emission characteristics are solvent dependent, different solvents have been examined viz. MeOH, EtOH, DMF, CHCl 3 , CH 3 CN and DMSO for fluorescence recognition of PA. 59 Figure S31 (ESI) reveals that fluorescence enhancement is the highest in MeOH/ H 2 O (1/4, v/v, l ex , 480 nm) and hence the entire experiment is carried out in this media.…”

A Vanillinyl‐Hydrazone Schiff Base: Recognition of Mg2+, Zn2+, Cd2+ and I− by Turn‐On Fluorescence Method

“…On the other hand, S. Nandi et. al reports a probe with the same core structure but there is no –OMe group and that probe shows fluorescence sensitivity towards Zn 2+ , Al 3+ and I − . Table S1 shows the properties of some reported molecules varying methoxy substituent.…”

A Simple Perceptive Diphenyl‐Imidazole‐Based Dipodal Schiff‐Base Chemosensor for Zn2+ and PPi ions and Its Live‐Cell Imaging Applications

“…Among the metal ions present in the human body, zinc is found to be second most abundant transition metal ion after iron and it involves in several biological evolution such as, enzyme regulation, neurotransmission and apoptosis etc . However the presence of a lower amount of zinc ions in human may cause diseases like alzheimer, osteoporosis cerebral ischemia and epilepsy, and also extreme presence of zinc ions in the environment tends to reduce the activity of microbes present in soil. Hence, selective and sensitive sensors for the detection of zinc ion is become very much needed.…”